In an interview with MusicWeek, the band's manager Scott Rodger said: "They're in with James Murphy on three or so songs, plus Markus Dravs who is a long-time collaborator. They write too many songs - that's a good problem to have. There's around 35 songs with Arcade Fire, two albums' worth for sure."

Speculation arose about the band working with Murphy earlier this year, but he later denied involvement in Arcade Fire's fourth album.

He said: "That's not necessarily true. We don't work like that. Because I work with friends, if I have time and they're doing something and I'm on the East Coast, then we can do something. But also they don't need a producer, in a way. They produce themselves."